Gets the relative tolerance for objective function f(x).
Equivalent in C API: nlopt_get_ftol_rel
FTolRel
auto opt = Opt(Algorithm.auglag, 2); opt.setFTolRel(1e-4); assert(opt.getFTolRel() == 1e-4);
See Implementation
Gets the relative tolerance for objective function f(x).
Equivalent in C API: nlopt_get_ftol_rel